Difference between fixed hair method and movable hair method
Answers
In this method, the staff interval is kept constant by changing the distance between the stadia hairs. Targets on the staff are fixed at a known interval and the stadia hairs are adjusted to bisect the upper target at the upper hair and the lower target at the lower hair. Instruments used in this method are required to have provision for the measurement of the variable interval between the stadia hairs. As it is inconvenient to measure the stadia interval accurately, the movable hair method is rarely used.
Answer:
In this method interval between two stadia hair is fixed. In this method interval between two stadia hair is variable. Stadia line are not fixed and moved by micrometer screw.
Explanation:
In stadia device there's more velocity and readings are without difficulty be taken. In tangential system there's less pace and analyzing are not easily be taken. Stadia technique with the team of workers being held vertically is in commonplace use in tachometry. Tangential approach or gadget isn't in commonplace use.one-of-a-kind structures of Tacheometric size:
The diverse structures of tacheometric survey may be categorized as follows: The stadia system
(a) constant Hair technique of Stadia method (
b) Movable hair method, or Subtense method
The tangential machine
Measurements through special units The principle common to ..
In case of tangential technique, the stadia hairs are not used, the readings beings taken towards the horizontal move – hair. To degree the team of workers intercept, two pointings of the devices are, therefore, vital. This necessitates size of vertical angles twice for one unmarried remark.
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